Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report
A baseline environmental characterization of the inner Kachemak Bay, Alaska was conducted using standardized National Status and Trends Bioeffects Program methods. Three sites near the village of Port Graham were also sampled for comparison. Concentrations of over 120 organic and metallic contaminan...
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2011
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ftoceandocs:oai:aquadocs.org:1834/30655 2023-05-15T16:57:47+02:00 Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report Hartwell, S. Ian Apeti, A. Dennis Clarlin, W. Larry Johnson, W. Edward Kimbrough, L. Kimani 2011 application/pdf 38 http://hdl.handle.net/1834/30655 en eng NOAA/National Centers for Coastal Ocean Science Silver Spring, MD http://www.ccma.nos.noaa.gov/publications/kachemakbayshort.pdf http://hdl.handle.net/1834/30655 http://aquaticcommons.org/id/eprint/14765 403 2014-02-27 19:07:53 14765 United States National Ocean Service Biology Ecology Fisheries Management Pollution monograph 2011 ftoceandocs 2023-04-06T17:04:14Z A baseline environmental characterization of the inner Kachemak Bay, Alaska was conducted using standardized National Status and Trends Bioeffects Program methods. Three sites near the village of Port Graham were also sampled for comparison. Concentrations of over 120 organic and metallic contaminants were analyzed. Ambient toxicity was assessed using two bioassays. A detailed benthiccommunity condition assessment was performed. Habitat parameters (e.g. depth, salinity, temperature, dissolved oxygen, sediment grain size, and organic carbon content) that influence species and contaminant distribution were also measured at each sampling site. The following is the synopsis of findings• Sediments were mostly mixed silt and sand with pockets of muddy zones. Organic compounds (PAHs, DDTs, PCBs, chlorinated pesticides) were detected throughout the bay but at relatively low concentrations. With some exceptions, metals concentrations were relatively low and probablyreflect the input of glacial runoff.• Homer Harbor had elevated concentrations of metallic and organic contaminants. Concentrations of organic contaminants measured were five to ten times higher in the harbor sites than in the open bay sites. Tributyltin was elevated in Homer Harbor relative to the other areas.• There was no evidence of residual PAHs attributable to oil spills, outside of local input in the confines of the harbor.• The benthic community is very diverse. Specific community assemblages were distributed based on depth and water clarity. Species richness and diversity was lower in the eastern end of the bay in the vicinity of the Fox River input. Abundance was also generally lower in the easternportion of the study area, and in the intertidal areas near Homer. The eastern portions of the bay are stressed by the sediment load from glacial meltwater.• Significant toxicity was virtually absent.• The benthic fauna at Port Graham contained a significant number of species not found in Kachemak Bay.• Selected metal concentrations were elevated at Port ... Book Kachemak Alaska IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Open Bay ENVELOPE(-56.015,-56.015,51.583,51.583) |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Ecology Fisheries Management Pollution |
spellingShingle |
Biology Ecology Fisheries Management Pollution Hartwell, S. Ian Apeti, A. Dennis Clarlin, W. Larry Johnson, W. Edward Kimbrough, L. Kimani Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report |
topic_facet |
Biology Ecology Fisheries Management Pollution |
description |
A baseline environmental characterization of the inner Kachemak Bay, Alaska was conducted using standardized National Status and Trends Bioeffects Program methods. Three sites near the village of Port Graham were also sampled for comparison. Concentrations of over 120 organic and metallic contaminants were analyzed. Ambient toxicity was assessed using two bioassays. A detailed benthiccommunity condition assessment was performed. Habitat parameters (e.g. depth, salinity, temperature, dissolved oxygen, sediment grain size, and organic carbon content) that influence species and contaminant distribution were also measured at each sampling site. The following is the synopsis of findings• Sediments were mostly mixed silt and sand with pockets of muddy zones. Organic compounds (PAHs, DDTs, PCBs, chlorinated pesticides) were detected throughout the bay but at relatively low concentrations. With some exceptions, metals concentrations were relatively low and probablyreflect the input of glacial runoff.• Homer Harbor had elevated concentrations of metallic and organic contaminants. Concentrations of organic contaminants measured were five to ten times higher in the harbor sites than in the open bay sites. Tributyltin was elevated in Homer Harbor relative to the other areas.• There was no evidence of residual PAHs attributable to oil spills, outside of local input in the confines of the harbor.• The benthic community is very diverse. Specific community assemblages were distributed based on depth and water clarity. Species richness and diversity was lower in the eastern end of the bay in the vicinity of the Fox River input. Abundance was also generally lower in the easternportion of the study area, and in the intertidal areas near Homer. The eastern portions of the bay are stressed by the sediment load from glacial meltwater.• Significant toxicity was virtually absent.• The benthic fauna at Port Graham contained a significant number of species not found in Kachemak Bay.• Selected metal concentrations were elevated at Port ... |
format |
Book |
author |
Hartwell, S. Ian Apeti, A. Dennis Clarlin, W. Larry Johnson, W. Edward Kimbrough, L. Kimani |
author_facet |
Hartwell, S. Ian Apeti, A. Dennis Clarlin, W. Larry Johnson, W. Edward Kimbrough, L. Kimani |
author_sort |
Hartwell, S. Ian |
title |
Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report |
title_short |
Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report |
title_full |
Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report |
title_fullStr |
Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report |
title_full_unstemmed |
Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report |
title_sort |
sediment quality triad assessment in kachemak bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. a noaa/nos/nccos/ccma special report |
publisher |
NOAA/National Centers for Coastal Ocean Science |
publishDate |
2011 |
url |
http://hdl.handle.net/1834/30655 |
long_lat |
ENVELOPE(-56.015,-56.015,51.583,51.583) |
geographic |
Open Bay |
geographic_facet |
Open Bay |
genre |
Kachemak Alaska |
genre_facet |
Kachemak Alaska |
op_source |
http://aquaticcommons.org/id/eprint/14765 403 2014-02-27 19:07:53 14765 United States National Ocean Service |
op_relation |
http://www.ccma.nos.noaa.gov/publications/kachemakbayshort.pdf http://hdl.handle.net/1834/30655 |
_version_ |
1766049405142564864 |